This is the same firmware as ours, just in Russian. Probably most of us have the Eng-Span version, this is just the corresponding Eng-Rus one.
Btw. In bright sun light the colors become almost not washed out
.
Very good light conditions are a prerequisite for a good experience on this device, maybe that's also a good thing, it reminds you that your eyes also need very good light conditions for prolonged reading sessions.